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Troubleshooting
2.4.4.16. P7 malfunction
P7 display
High temperature protection of
evaporator
Whether compressor
operates?
Yes
Check whether the heat
exchanger is dirty, the air-
outlet is blocked and the
indoor fan is running
normal?
No
Clean the heat exchanger and
the air-outlet
Check whether the
indoor fan is running
normal
No
Check refrigerant system
(such as clogging of
capillary etc.)
142
Whether the
No
connection is
good?
Yes
Check the
resistance value of
the sensor via
Appendix 1,Is it
normal?
Yes
Whether the indoor
PCB is normal?
No
Reconnect and retest
No
Replace the temperature sensor
No
Replace the indoor PCB
Electrical Control System
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